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Performance limits of delay lines based on optical amplifiers.

Jacob B Khurgin1

  • 1Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA. jakek@jhu.edu

Optics Letters
|April 8, 2006
PubMed
Summary
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Tunable optical buffers using amplifiers show performance limitations. High gain requirements for storing more than 5 bits make these optical delay lines impractical for advanced applications.

Area of Science:

  • Photonics
  • Optical communications
  • Information storage

Background:

  • Tunable optical buffers are crucial for optical signal processing and data buffering.
  • Optical amplifiers are key components in these buffer systems.
  • Gain flattening is a technique explored to improve buffer performance.

Purpose of the Study:

  • To analyze the performance of tunable optical buffers.
  • To investigate the impact of gain flattening on buffer performance.
  • To derive an analytical expression for storage capacity limitations.

Main Methods:

  • Analysis of tunable buffer performance using optical amplifiers.
  • Application of gain flattening techniques.
  • Derivation of a simple analytical expression relating gain and storage capacity.

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Main Results:

  • The required gain for tunable storage increases nonlinearly with the number of bits (N).
  • Gain requirements become unrealistically high for storage capacities exceeding 5 bits.
  • The performance is compared against other optical delay line technologies.

Conclusions:

  • Tunable optical buffers based on amplifiers face significant scalability challenges.
  • Gain limitations restrict the practical storage capacity of these devices.
  • Alternative optical delay line approaches may be more suitable for higher storage needs.